Hello! I'm getting a little worried about my Cavalier, Chauncey. He just turned three and has always been healthy, but in the last few months, he's been having dry heaves. Nothing ever comes up, just heaves. This has gotten worse in the past week, where he's waking up in the middle of the night at least 3x. He's eating and drinking well, and is having no issues with bodily functions. I have heard everything from heartworm to Kennel Cough. We do have two other dogs (1 Cocker Spaniel just adopted from the shelter where I volunteer, and 1 Saint Bernard), neither of which have any symptoms of the cough/heaves. Any suggestions would be greatly appreciated!